Gas or petroleum motor.



No. 654,356.,v y Patented luly 24. |900.

J. RAMBAUD.

GAS 0R PETROLEUM MOTUR.

(Appumion mea annie,V 1599.) (No Model.) 2 Sheets-Sheet Wfnesses /mvv 1m: npnms PETERS cu, PNcJToLlYnaJ-wnsmnnmn, n. c.

No. 654,356. Pat'ented .luly 24, |900. J. RAMBAUD.

GAS 0R PETRDLEUM MOTOR.

(Application Bled July 6, 1899.5 (N0 Model.) 2 Sheets-Sheet 2.

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TH: Ncnms Patins cu4 moaurnc.. wAsuINo-rou, n cy UNITED STATES" PATENT OFFICE, y

JEAN RAMnAUmoF LYoNs, FRANCE,

I(.AS OR PETROLEUM MOTOR.

srn'cirrcfariri forming pare of Letters Patent No. 654,356, dated July 24, 1900. Application led July 6, 1899. Serial No, 722,953. (No model.)

To tZZ whom it may concern,.-

Beit known that I, JEAN RAMBAUD, mechanician, a citizen of the Republic of France, residing at 12 Rue .de lOiselire, Lyons, France, have invented certain new and useful Improvements in Gas, Petroleum, and' Like Motors, of which the following is a speciiication.

In order to obviate to a certain extent the heating produced in motors operated by means of successive explosions, the circulation of water has hitherto generally been employed. This method, however, necessitates special fittings or installations and only ef, This defect is out any danger of any appreciable heating. This novel cycle of operations consists in adding to the cycle of four phases constituting the ordinary Otto cycle two other supplementary phases for effecting the cooling by means of the suction of pure external air by the cylinder after the exhaust of the burned gases,

thus rendering my novel motor a motorop'er! ating with a cycle of six phases.

In the accompanying drawings I have represented, by way of example, a petroleum-motor for motor-vehicles operating with a cycle of six phases, in which- Figure l is a central longitudinal section through the motor. Fig. 2 is a cross-section taken upon the line A B, passing along the axis of the valves of the cylinder end; and Fig. 3 is a plan of the same, partly in section.

In order to the better illustrate the motor in Figs. 2 and 3, this motor is represented as consisting of two coupled motors, the pistons of which, for the purpose of insuring equilibrium and avoiding vibration, are arranged at an angle of one hundred and eighty degrees with respect one to the other. Nevertheless the said motor may equally Well be employed singly, or it may consist of a series of coupled motors. The cylinder end of each of the two motors comprises three valves, the valve 1 d being for the admissionvof the carbureted mixture or gas employed, the valve b for the exhaust of the burned gases, while the third y valve c is for the admission of pure air-that is b and c, which are operated separately, havey been shown arranged upon a ilat part formed at the extremity of the cylinder end. These valves b and c are opened at the precise moment desired by means ofordinarycams byv the intermediaryof corresponding levers d 4or, e, pivoted upon a transverse axis f, the said cams being rigidly fixed upon the shaft g,

jwhich rotates, by the intermediate of toothed wheels h and/i, at a velocity three times less than the driving-shaft j in order to correspond to this novel cycle of operations. The valve b for the discharge of the burned gases is maintained open by means of a cam k during one phase only, while the valve c, serving for the suction of pure air for cooling purposes, is maintained open by its cam during two consecutive phases corresponding to the admission and exhaust of this air.

\ The cycle of operation of this motor is therefore composed as follows: The first phase (the forward travel of the piston) corresponds to the admission of the mixture, which is produced in the manner indicated, by the automatic valve a, the second phase (the return of the piston toward the rear) to the compression and ignition by means of the electric arc r, the third phase (forward travel) to the driving-stroke, the fourth phase (the return motion) to the exhaust through the valve b of the burned gases, the fifth phase (that of forward motion) to the admission of pure air through the valve o, and, finally, the sixth phase (rearward motion) to the discharge of this air through the saine valve.

Vhen this motor is applied to motor roadvehicles, (as is the case in. the construction represented by way of example in the accom- IOO panying drawings,) it will be readily understood that in descending inclines where it is not necessary to expend any force the motor may be allowed to rotate freely without explosion, and consequently without cost, constantly sucking in air instead of alternately drawing in gas and air. In order to effect this, it is only necessary to maintain the airvalve c open, operating either by hand or foot Io a lever device arranged Within reach of the driver.

In addition to the principal advantage of constant cooling already indicated, enabling circulation of Water to be entirely dispensed with, while at the same time producing afar better cooling action, another and very important advantage consists in the fact that owing to these successive admissions and discharges of air the cylinder is completely zo cleansed after each discharge from the burned gases, thus enabling this motor to be operated by means of mixtures the constitu- \\\tion of which is only limited by their iniiaminability. Now, as is well known, this has z 5 not hitherto been possible, as mixtures which are already poor in themselves become still further diluted in the mass of burned gases which invariably remain in the cylinder end, thereby producing a non-explosive mass, giv- 3o ing rise to failures. Finally, it should be added that although the cooling of the cylinder is effected in this novel cycle of operations once in six phases a temperature is nevertheless maintained which is sufficiently high to permit of the utilization of the explosion under excellent conditions.

As already stated, the construction of this novel motor operating with a cycle of six phases may vary according to the special applications for which it is intended-for industrial purposes, the tractive force for motorvehicles, rbc. It may equally well be arranged vertically ashorizontally.

In a gas or like engine, the combination with a pair of cylinders, a piston operating in each of the said cylinders, and each suitably connected to a crank arranged at an angle of one hundred and eighty degrees with respect to each other and alternately operating, avalve-casing secured to one end of each of the said cylinders, a drive-shaft connected to said cranks,a spring-actuated valve mounted in each of the said casings and adapted to admit external air to said cylinders, means connected to said drive-shaft adapted for operating the said valve, a valve-casing secured t0 one end of each of the said cylinders, a spring-actuated valve operating therein and adapted 4to automatically admit an explosive charge to the said cylinders, a valve-casing secured to one end of each of the said cylinders, a spring-actuated valve arranged therein and adapted to permit of the discharge of the burned gases after the explosion of the said charge, means connected to said driveshaft for operating said valve, and a suitable igniting mechanism arranged in each of the 'said cylinders, substantially as described.

In testimony whereof I have hereunto set my hand, in presence of two subscribing Witnesses, this 14th day of June, 1899. y

JEAN RAMBAUD.

Witnesses:

GEORGES FEEYDIEE DUBREU'L, J EAN GERMAIN. 

